What is the soil temperature in ZIP code 81101 today?

About 45°F on average in the top 4 inches (0–10 cm), low 38°F and high 53°F, from NOAA's GFS model run of Nov 11, 12:00 UTC (7 am Eastern). It is a model value for a grid cell 9.7 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 81101?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 19 and 55°F from Mar 21.

ZIP 81101 · Alamosa, CO · Nov 11, 2026

Soil temperature for ZIP code 81101

45°Faverage today, 0–4 in deep (modelled)
low 38°F · high 53°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 9.7 km from the ZIP centre point

On a week ago

1° warmer

44°F on Nov 4

5-day mean

44°F

what the verdicts use

Held 55°F last spring

Mar 21

crabgrass germination temperature

What the soil says today

Pre-emergentSeason over
Cool-season seedToo late in the season
Warm-season seedToo cold
TomatoesToo cold
Peas and lettuceWarm enough

From the 5-day mean of the modelled 0–4 in layer.

Soil temperature, 0–4 in: last 7 days and next 7

°F, modelled. Dots and line: daily average (dashed = forecast); bars: low to high; green band: 50–55°F.

View as table

Day	Average	Low	High
Nov 4	44.3°F	38.2°F	51.2°F	analysis
Nov 5	44.7°F	39.0°F	51.6°F	analysis
Nov 6	44.2°F	39.7°F	49.9°F	analysis
Nov 7	43.9°F	37.7°F	51.3°F	analysis
Nov 8	43.9°F	38.0°F	51.7°F	analysis
Nov 9	44.1°F	38.0°F	51.9°F	analysis
Nov 10	44.3°F	37.7°F	52.2°F	analysis
Today	45.0°F	38.4°F	53.0°F	analysis
Nov 12	45.4°F	39.1°F	52.7°F	forecast
Nov 13	44.1°F	38.4°F	50.3°F	forecast
Nov 14	42.8°F	37.9°F	47.9°F	forecast
Nov 15	45.1°F	40.9°F	51.2°F	forecast
Nov 16	43.6°F	38.1°F	50.0°F	forecast
Nov 17	43.4°F	37.5°F	50.6°F	forecast

Source: NOAA NCEP GFS 0.25°, 0–10 cm soil temperature, run Nov 11, 12:00 UTC (7 am Eastern).

Spring 2026 threshold dates

From the 5-day mean held for 10 days or more.

Soil	What it means	Held from (spring 2026)
40°F	Peas and lettuce	Feb 26
50°F	Pre-emergent window opens	Mar 19
55°F	Crabgrass can germinate	Mar 21
60°F	Tomatoes	May 11
65°F	Warm-season grass seed	Jun 2

Nearby ZIP codes

Today's modelled average.

81146 45°F · 81123 44°F · 81144 42°F · 81136 45°F · 81151 44°F · 81124 43°F · 81140 40°F · 81141 43°F

More: crabgrass timing in Colorado · every Colorado city · how accurate the model is.

Questions

What is the soil temperature in ZIP code 81101 today?: About 45°F on average in the top 4 inches (0–10 cm), low 38°F and high 53°F, from NOAA's GFS model run of Nov 11, 12:00 UTC (7 am Eastern). It is a model value for a grid cell 9.7 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 81101?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 19 and 55°F from Mar 21.

Data: Global Forecast System (GFS) 0.25°, soil temperature 0–10 cm (TSOIL) (NOAA National Centers for Environmental Prediction (NCEP)); 2025 Gazetteer ZIP Code Tabulation Areas (ZCTA) and 2024 cartographic boundary state outlines (U.S. Census Bureau).